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Authors
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Bartosch, S.; Kohn, B.; Scheler, U.
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Title
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Chain dynamics in a polyelectrolyte solution under shear: a rheological NMR investigation
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Date
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21.08.2023
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Number
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0
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Abstract
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Rheological nuclear magnetic resonance (NMR) has been applied to study the effect of shear on the chain dynamics in a solution of a linear poly(sodium 4-styrenesulfonate). Information on the chain dynamics of poly(sodium 4-styrenesulfonate) sheared in a narrow-gap concentric double cylinder cell is inferred from the NMR transverse relaxation T<sub>2</sub> for a concentration in the semidilute- entangled and in the concentrated regime. In the semidilute-entangled concentration enhanced relaxation is observed. In the concentrated regime signatures of a loss of entanglements are seen with increasing T<sub>2</sub> and a decreasing fraction of the polymer showing restricted motion. The effect is enhanced when the electrostatic interaction along the polymer chain is reduced by the addition of NaCl.
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Publisher
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Springer
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Wikidata
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Citation
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Applied Magnetic Resonance 54 (2023) 1533-1541
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DOI
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https://doi.org/10.1007/s00723-023-01598-9
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Tags
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